<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="root"></div>
    <script src="https://unpkg.com/react@18/umd/react.development.js" crossorigin></script>
    <script src="https://unpkg.com/react-dom@18/umd/react-dom.development.js" crossorigin></script>
    <script src="https://unpkg.com/babel-standalone@6/babel.min.js"></script>
    <script type="text/babel">
        class InputElement extends React.Component{
            constructor(props){
                super(props);
                this.state = {
                    info:""
                }
            }
            
            render(){
                return <div>
                        <label>{this.props.children}</label>
                        <input 
                        type={this.props.type} 
                        value={this.props.value}
                        onBlur={this.props.validate} 
                        onInput={this.props.onInput}/>
                        <span>{this.props.info}</span>
                    </div>
            }
        }
        class MyComponent extends React.Component{
            constructor(props){
                super(props);
                this.state = {count:0,value:"hello"};
                this.cnt = 0;
                // this.handleClick = this.handleClick.bind(this);
            }
            handleClick(){
                // console.log(this)
                console.log(this.state.value)
            }
            // handleClick = () => {
            //     this.cnt++;
            //     console.log(this.cnt)
            //     // this.setState({
            //     //     count:this.state.count + 1
            //     // })
            // }
            render(){
                return <div>
                        计数器：{this.state.count},{this.cnt}
                        <input type="button" value="ok" onClick={this.handleClick.bind(this)} />
                        <InputElement value={this.state.value} onInput={(e) => this.setState({value:e.target.value})}>姓名：</InputElement>
                    </div>
            }
        }

        ReactDOM.createRoot(document.getElementById("root")).render(<MyComponent />);
    </script>
</body>
</html>